 The Tenderloin has been a downtown residential community since shortly after the California Gold Rush in 1849.However, the name "Tenderloin" does not appear on any maps of San Francisco prior to the 1930s; before then, it was labeled as "Downtown", although it was informally referred to as "the Tenderloin" as early as the 1890s.The area had an active nightlife in the late 19th century with many theaters, restaurants and hotels.